Jack or slider for use in circular-knitting machines



Jan. 5, 1926.

. w. SPIERS JACK OR SLIDER FOR USE IN CIRCULAR KNITTING MACHINES Filed Dec. 24, 1923 INVENTOR:

ATTORNEY Patented Jan. 5, 1926.

* UNITED STATES;

WILLIAIIJIVSPIERSV, or LEICESTER, ENGLAND.

JACK R SLIDER FOR USE IN CIRCULAR-KNITTING MACHINES.

Application filed December 24, 1923. Serial No. 682,568.

To all whom it may concern:

Be it known that I, WILLIAM Srmns, a

subject of the King of Great Britain, residing at Leicester, in the county of Leicester, England, have invented new and useful Improvements in or Relating to Jacks or Sliders for Use in Circular-Knitting Machines, of which the following is a specification. Thisinvention relates to jacks or sliders foruse in circular knitting machines or" the kind having two superimposed end-to-end needle cylinders such, for example, as described in British Patent Specifications Nos. 15008 of .1900 and 24290 of 1912. One object of the invention is to improve the construction of jacks or sliders ofthis kind with a view to ensuring proper contact or engagement between the jack and needle during the operation of transferring.

A further object of the invention is to improve the construction of the jack or slider so that during actuation of the needle by the slider for knitting purposes, relative movement between the two will be elimi- .nated or at any rate reduced to such a de gree as to be negligible.

In order that the invention may be more clearly understood reference will be made in the following further description to the accompanying drawings, in which two concrete examples of the invent-ion are illustrated.

Inv the drawings,

Figures 1 and 2 are side views of a jack or slider having the shoulder for contact with the needle pivotally mounted therein.

Figures 3 and 4 are side views of ajack or slider in which the part having the shoulder is slidable relatively to the other part, and I Figure 5 shows various modifications in the shape of the shoulder.

Figures 1, 2 and 5 are drawn to a scale.

four times actual size, and Figures 3 and 4 to a scale twice actual size, and like parts are designated by the same reference characters throughout the dra ings.

In each example the jack or slider is shown in conjunction with a needle in the positions occupied by these parts during the knitting and transferring operations respectively. r

According to the concrete example shown in Figures 1 and 2,the body 1 of the jack or slider is cut away below the hooked nose or projection 2 fora suitable distance and has formed in it a socket 3. The cut away portion of the jack or slider is made up by a part or member in the formof a latch 4 which at its lower extremity is rounded as indicated at 5 to fit and turn within the socket 3, and has a shoulder 6 formed at its upper extremity for contact with the hook 7 of the needle 8. The shoulder 6 may be made concave or alternatively it may be curved, inclined or V shaped as shown re spectively at 6, 6 and 6 in Figure 5.

Normally i. e. during the knitting operation the latch 4 lies close'against the body of the jack or slider 1 being held in this position by the bottom of the needle groove 9 but when necessary e. g. during the transferring operation when the inclined extension 10 of the ack is engaged by the divider cam represented at 11 the latch 4, being in contact with the hook 7 of the needle 8, can move outwards from the body of the jack by turning in the socket 3 without disturbing the relation of the shoulder 6 to the needle hook 7.

The latch a may be otherwise mounted in or on the body 1. i-ilternatively the ack or slider may be made in two or more parts pivotally or hingedly connected together so that the upper part of the instrument i. e. the part above the shoulder may be moved angularly outwards without disturl'iing the relationship aforesaid.

According to the concrete example of the invention illustrated in Figures 3 and 4 the jack is made in two parts as aforesaid. One of said parts 12 has formed upon it the usual nose 2 for engaging the needle hook 7 and the inclined extremity 10 for engaging with the divider cam 11. A butt 13 is also provided on said part for actuation of the latter by cams for knitting purposes. The other part 1 1 has formed upon it the shoulder 6 which is concave, or as hereinbefore stated it may be curved, inclined or V shaped as shown respectively at 6. 6 and 6 in Figure 5 and said part also has a butt 15 adapted for actuation by cams for transferring purposes.

The part 12 has slidable and pivotal connection with the part 14 to which end the latter has formed in it a dovetailed recess or opening 16 into which a correspondingly shaped projection 17 on the adjacent edge of the part 12 is received. The projection 17 is shorter in length than the opening 1.6 so that the necessary endwise movement of Cit the shouldered part let relatively to the part 12 can take place for closing and opening the hook receiving gap of the jack.

The face of the projection 17 may be rounded to enable the shouldered part 14 to have oscillatory movement thereon in edgewise relation to the part 12 for the purpose aforesaid.

The butts 13 and of the respective jack parts are operated upon by suitable cams. During the transferring operation, the cams move the butts away from each other so that the. gap in the jack is opened thus allowing the needle hook 7 to pass out when the ack 12 having the nose 2 thereon is moved outwards by the divided cam 11. During this outward movement the shouldered part it of the jack remains in vertical alignment with the needle 8 in the needle. trick 9 and the hook 7 remains located in and supported by the shoulder 6, see Figure For the knitting operation, the cams move the butts l3 and 15 towards each other to close the gap and imprison the needle hook (see Figure 3) and during the knitting movements said cams maintain the jack parts in this relationship to hold the needle hook against endwise movement in the jack.

lVhat I claim then is 2- 1. A slider for co-operation with a knitting machine needle, comprising a nose part adapted toengage the inside of the needle hook, and a shoulder part for engagement with the outside of the needle hook, one of said parts having a socket in which the other part is mounted so as to have pivotal movement with respect to said socketed part.

2. A slider for co-operation with a knitting machine needle, comprising a nose part adapted to engage the inside of the needle hook, and a shoulder part for engagement with the outside of the needle hook, one of said parts having a socket in which the other part is mounted so as to have pivotal and sliding movement with respect to the socketed part.

A slider for co-operation with a knitting machine needle, comprising a nose part adapted to engage the inside of the needle hook, a butt on said part adapted for actuation by cams, and a shoulder part for engagement with the outside of the needle hook, one of said parts having a socket in which the other part is mounted so as to have pivotal movement withrespect to said socketed part.

l. A slider for co-operation with a knitting machine needle, comprising a nose part adapted to engage the inside of the needle hook, a butt on said part adapted for actuation by cams, a shoulder part for engagement with the outside of the needle hook, and a butt on said shoulder part for actuation by cams, one of said parts having a socket in which the other part is mounted so as to have pivotal and sliding movement.

5. A slider for co-operation with a knitting machine needle, comprising a nose part adapted for engagement with the inside of the needle hook, shoulder part for engagement with the outside of the needle hook, one of said parts having a socket in which the other partis mounted so as to be capable of pivotal and sliding movement, a butt on each part to be acted upon by cams for moving said parts endwise to carry the nose and shoulder elements towards and away from each other. and an inclined extension on the nose part to be acted upon by a cam to deflect said part outwards.

G. A slider for co-operation with a knitting machine needle, comprising a nose part for engagement with the inside of the needle hook, a slidable shoulder part for engagement with the outside of the needle hook and having a recess or opening, a projection on the nose part adapted to pivot within said recess, a butt on each of said parts to be acted upon by cams for moving the nose part and shoulder part endwise towards or away from each other, and an inclined extension on saidnose part adapted to be acted upon by a cam to deflect said part outwards.

'7. A slider for cooperation with a knitting machine needle, having a nose part for engagement with the inside of the needle hook, a shoulder part slidable on the nose part and having a concave upper end for engagement with the outside of the needle hook, and a dovetailed recess near its lower end, a dovetailed projection on the lower end of the nose part adapted to pivot and slide within said recess, a butt on each of said parts to be acted upon by cams for moving the nose part and the shoulder part endwise relatively to each other, and an inclined upper extremity on the nose part adapted to be acted upon by a cam to pivotally deflect said part outwards.

8. A slider for co-operation with aknitting machine needle, having a nose part for engagement with the inside of the needle hook, a shoulder part slidable and pivotal on said nose part and having a concave upper end for engagement with the outside of the needle hook and a dovetailed recess near its lower end, a dovetailed projection on the lower end of the nose part adapted to pivot and slide within said recess, abutt on the nose part and a butt on the shoulder part to be acted upon by cams for moving said parts endwise relatively to each other, and an inclined upper extremity on said nose part adapted to be acted upon by a cam to deflect said part outwards.

In testimony whereof I have signed my name to this specification.

WVILLIAM SPIERS, 

